In addition each of theNodullärballs also
acts to form of geometric barrier which helps to

displace and irradiates heat over a larger surface area the air entrapped thus ,
reduces the rate of heattransfer
compared with dense, natural aggregates. Resulting
the use of
Nodullärin concrete improves, (i.e. reduces) the
thermal conductivity. Therefore , the thermal properties of Nodullärhave been used widely to improve thermal
insulation in buildings and structures.